The incidence of E. coli O157, Salmonella typhimurium, Listeria monocytogenes, and Yersinia enterocolitica were studied in some locally produced cheeses.Thirty samples of each kind of the cheese were tested for the presence of some pathogens, which are frequently associated with food born disease.E. coli O157: IMS; Listeria monocytogenes were enumerated on modified Oxford agar; Salmonella was enum...